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P1401 2001 Ford F150 Code - DPFE Sensor Circuit High

Quick Answer

The P1401 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates an issue with the Differential Pressure Feedback EGR (DPFE) sensor circuit being too high. Common causes include Faulty DPFE sensor, Damaged or corroded wiring/connectors leading to the DPFE sensor, Clogged EGR passages. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P1401 2001 Ford F150 indicates DPFE Sensor Circuit High.
Common causes
Common causes include Faulty DPFE sensor, Damaged or corroded wiring/connectors leading to the DPFE sensor, Clogged EGR passages.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P1401 2001 Ford F150 Description

The P1401 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates an issue with the Differential Pressure Feedback EGR (DPFE) sensor circuit being too high. The DPFE sensor is a crucial component of the Exhaust Gas Recirculation (EGR) system, which helps reduce harmful emissions by recirculating a portion of the exhaust gases back into the engine intake to be re-burned. The DPFE sensor measures the flow and pressure of the EGR gases and sends this information to the engine control module (ECM) for proper operation.

OBDII Code P1401 2001 Ford F150 - DPFE Sensor Circuit High
P1401 2001 Ford F150 Code - DPFE Sensor Circuit High

Common Causes of P1401 2001 Ford F150

  1. Faulty DPFE sensor
  2. Damaged or corroded wiring/connectors leading to the DPFE sensor
  3. Clogged EGR passages
  4. Exhaust leaks near the DPFE sensor
  5. ECM software issues

Symptoms of P1401 2001 Ford F150

  1. Check engine light illuminated on the dashboard
  2. Rough idling or stalling when coming to a stop
  3. Decreased fuel efficiency
  4. Engine knocking or pinging noises
  5. Reduced engine power and acceleration

How to Fix P1401 2001 Ford F150

  1. Begin by performing a visual inspection of the DPFE sensor, wiring, and connectors for any signs of damage or corrosion.
  2. Test the DPFE sensor using a digital multimeter to check for proper resistance values.
  3. Clean out any clogged EGR passages or replace any damaged components.
  4. Reset the ECM and clear the trouble code with a scan tool.
  5. Test drive the vehicle to ensure the issue has been resolved and the check engine light does not reappear.

Cost to Fix P1401 2001 Ford F150

The typical repair costs for addressing a P1401 code on a 2001 Ford F150 can vary depending on the specific cause of the issue. In general, replacing a faulty DPFE sensor can cost between $50 and $200, while repairing wiring or connectors may add additional labor costs. Overall, the total repair bill for this issue could range from $100 to $400, including parts and labor. Keep in mind that the actual cost can vary based on factors such as location, vehicle make and model, and the rates of the auto repair shop. It's recommended to obtain a detailed estimate from a qualified mechanic before proceeding with any repairs.

What does this mean?

Tech Notes for P1401 2001 Ford F150

The EGR monitor checks the DPF EGR sensor signal to the PCM for high voltage. The test fails when the average voltage to the PCM goes to a voltage greater than the maximum calibrated value.



There is a factory service bulletin for the 2001 Ford F-150:

2001 Ford F-150 Factory Service Bulletin OBDII Code P1401 Code



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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1401 2001 Ford F150 Code

1. What are the common symptoms of OBDII code P1401 on a 2001 Ford F150?

- Common symptoms include rough idling, engine stalling, decreased fuel efficiency, and a Check Engine Light illuminated on the dashboard.

2. What does the OBDII code P1401 on a 2001 Ford F150 indicate?

- The code P1401 indicates a fault in the Differential Pressure Feedback EGR (DPFE) sensor circuit, specifically a high voltage condition.

3. What are the possible causes of the DPFE Sensor Circuit High code on a 2001 Ford F150?

- Possible causes include a faulty DPFE sensor, damaged wiring or connectors in the sensor circuit, or a clogged EGR system.

4. How do I diagnose the DPFE Sensor Circuit High issue on a 2001 Ford F150?

- Diagnosis typically involves checking the DPFE sensor's voltage, inspecting the sensor and its connections for damage, and testing the EGR system for blockages.

5. Can I drive my 2001 Ford F150 with the P1401 code?

- It is not recommended to drive the vehicle with the P1401 code, as it can lead to poor engine performance and potential damage if left unaddressed.

6. How can I repair the DPFE Sensor Circuit High issue on my 2001 Ford F150?

- Common repairs include replacing the DPFE sensor, repairing damaged wiring or connectors, and cleaning or replacing components in the EGR system.

7. Will resetting the Check Engine Light resolve the P1401 code on a 2001 Ford F150?

- Resetting the Check Engine Light may temporarily clear the code, but it will likely return if the underlying issue causing the code is not addressed.

8. Is it safe to continue driving my 2001 Ford F150 if the DPFE Sensor Circuit High code comes on intermittently?

- It is not recommended to continue driving the vehicle if the code comes on intermittently, as it can indicate an underlying issue that needs to be addressed.

9. Can a DIY enthusiast repair the DPFE Sensor Circuit High issue on a 2001 Ford F150?

- Depending on the level of expertise, DIY enthusiasts may be able to replace the DPFE sensor or check for basic wiring issues, but more complex diagnostics may require professional assistance.

10. How much does it typically cost to repair the DPFE Sensor Circuit High issue on a 2001 Ford F150?

- The cost of repairs can vary based on the specific issue, but replacing the DPFE sensor can range from $100 to $200, while addressing more complex wiring or EGR system issues may cost more.

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